BLM21BD272SN1L

Chip Ferrite Bead Overview

The Murata BLM21BD272SN1L is a single-line chip ferrite bead in the BLM21BD series, designed for surface-mount applications. It features an impedance of 2700 Ohms at a test frequency of 100 MHz with a tolerance of 25%. The component supports a maximum DC current of 200 mA and has a maximum DC resistance of 800 mOhms. It operates within a temperature range of -55°C to +125°C. The physical dimensions are 2.0 mm in length, 1.25 mm in width, and 0.85 mm in height, conforming to the 0805 (2012 metric) package.

Chip Ferrite Bead Feature Summary

• Provides high impedance attenuation for signal lines at 100 MHz to suppress electromagnetic interference.
• Complies with AEC-Q200 automotive qualification standards for reliability in vehicle electronics.
• Utilizes a compact 0805 surface-mount footprint suitable for space-constrained printed circuit board layouts.

Chip Ferrite Bead Applications

• Automotive safety systems
• Automotive powertrain circuits
• General automotive electronic modules

Chip Ferrite Bead Procurement Notes

Verify the specific suffix against official Murata documentation to confirm material composition and termination plating, as variations exist within the BLM21BD family. Ensure the ordered part matches the required AEC-Q200 grade if automotive validation is mandatory. Cross-reference the impedance value and current rating with the latest datasheet to prevent integration errors due to potential product revisions or alternate sizing guides.

Chip Ferrite Bead Selection Notes

Select this component when a 2700 Ohm impedance at 100 MHz is required for noise suppression in low-current signal paths. The 200 mA current rating limits suitability to low-power applications rather than high-current power rails. The 0805 package size offers a balance between thermal performance and board real estate. Confirm that the operating environment stays within the specified -55°C to +125°C range for reliable operation.

Chip Ferrite Bead Part Context

This component belongs to the Murata BLM21BD series of chip ferrite beads, which are engineered for automotive and industrial applications. The series is characterized by its compliance with AEC-Q200 standards, ensuring durability under harsh environmental conditions. The BLM21BD variant specifically targets signal line filtering where moderate current handling and precise impedance characteristics are necessary for effective EMI reduction.

Chip Ferrite Bead Replacement Considerations

BLM21BD272SH1L is a documented alternative within the same series offering similar electrical specifications.